CN204205791U - Spindle Motor and disc drive appts - Google Patents
Spindle Motor and disc drive appts Download PDFInfo
- Publication number
- CN204205791U CN204205791U CN201420438107.XU CN201420438107U CN204205791U CN 204205791 U CN204205791 U CN 204205791U CN 201420438107 U CN201420438107 U CN 201420438107U CN 204205791 U CN204205791 U CN 204205791U
- Authority
- CN
- China
- Prior art keywords
- cup portion
- gap
- spindle motor
- bonding agent
- endless member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C43/00—Assembling bearings
- F16C43/02—Assembling sliding-contact bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
- F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
- F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/30—Material joints
- F16C2226/40—Material joints with adhesive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/12—Hard disk drives or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
- F16C33/741—Sealings of sliding-contact bearings by means of a fluid
- F16C33/743—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap
- F16C33/745—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap by capillary action
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A kind of Spindle Motor and disc drive appts, described Spindle Motor comprises the stationary part and rotating part with axle and the first cup portion.First cup portion comprises plectane parts and endless member.Rotating part comprises the annular recessed portion of at least bottom holding endless member.There is lubricating oil in the gap between the surface and the surface of rotating part of stationary part.Hydrodynamic pressure bearing is formed by axle, rotating part and lubricating oil.The joint gap of the inner side arriving the first cup portion from the outer peripheral face of the first cup portion is formed between plectane parts and endless member.Being filled up by bonding agent at least partially of joint gap.
Description
Technical field
The utility model relates to a kind of Spindle Motor and disc drive appts.
Background technology
The Spindle Motor that disc is rotated is equiped with in the electronic equipments such as hard disk unit.Spindle Motor comprises: the stationary part being fixed on the casing of electronic equipment; And the rotating part that supports disc also rotates.
Stationary part and the rotating part of Spindle Motor link together across Hydrodynamic bearing apparatus.In Spindle Motor in recent years, make lubricating fluid be present in Hydrodynamic bearing apparatus between stationary part and rotating part.Such as disclose in DE102011014369A1 publication in Germany and disclose Hydrodynamic bearing apparatus in the past and there is the Spindle Motor of Hydrodynamic bearing apparatus.
In DE102011014369A 1 publication, such as in Figure 5, limiting part (stopper member) 218 has the first position (first part) 218a and hollow cylindrical portion (hollow cylindrical part) 218b.Axle 212 and the first position (first part) 218a are integrally formed.Further, hollow cylindrical portion (hollow cylindrical part) 218b is fixed with at the peripheral part of limiting part 218.When the first position 218a and hollow cylindrical portion 218b be split formed parts, there are such misgivings: the bearing oil (bearing oil) being present in motor internal spills to motor outside between the first position 218a and hollow cylindrical portion 218b.Therefore, need a kind of at Spindle Motor middle (center) bearing oil not to the structure that spills of motor outside.
Utility model content
The purpose of this utility model is to provide a kind of bearing oil not to the motor Spindle Motor that spills of outside and disc drive appts.
The Spindle Motor of the first utility model illustrated in the utility model comprises stationary part and rotating part.Stationary part has axle and the first cup portion.The central axis configuration that axle vertically extends.Rotating part can rotate around central axis around axle.First cup portion comprises plectane parts and is installed on the endless member of plectane parts.The lower end of endless member forms the bottom of the first cup portion at least partially.Rotating part comprises the first upper surface, annular recessed portion, the first inner peripheral surface and the second inner peripheral surface.First upper surface is opposed with plectane parts.Annular recessed portion holds at least bottom of endless member.First inner peripheral surface is opposed with the outer peripheral face of axle.Second inner peripheral surface is opposed with the outer peripheral face of the first cup portion.There is lubricating oil in the gap between the surface and the surface of rotating part of stationary part.Hydrodynamic pressure bearing is formed by axle, rotating part and lubricating oil.The outer peripheral face of the first cup portion across as the seal clearance of radial clearance and the second inner peripheral surface of rotating part opposed.The upper liquid level of lubricating oil is positioned at seal clearance.Form between plectane parts and endless member and arrive joint gap inside the first cup portion from the outer peripheral face of the first cup portion.Being filled up by bonding agent at least partially of joint gap.
The disc drive appts of the second utility model illustrated in the utility model has disc.Disc drive appts comprises: make the Spindle Motor that disc rotates; Disc is carried out to the access portion of the reading of information and at least one operation in writing; And hold the casing in Spindle Motor and access portion.
By the Spindle Motor of the first utility model illustrated in the utility model, can prevent lubricating oil from spilling from hydrodynamic pressure bearing to motor outside.
By the detailed description of following preferred implementation, with reference to accompanying drawing, above-mentioned and other key element of the present utility model, feature, step, feature and advantage more clearly can be understood.
Accompanying drawing explanation
Fig. 1 is the schematic sectional view of disc drive appts.
Fig. 2 is the schematic sectional view of Spindle Motor.
Fig. 3 represents the schematic sectional view near the first cup portion.
Fig. 4 is the cutaway view of the part being exaggerated Fig. 3.
Fig. 5 is the cutaway view of the part being exaggerated Fig. 4.
Fig. 6 is the cutaway view representing variation.
Fig. 7 is the cutaway view representing other variation.
Fig. 8 is the cutaway view representing other variation.
Fig. 9 is the cutaway view representing other variation.
Embodiment
In this manual, by the upside in the central axial direction of motor referred to as " upside ", downside is referred to as " downside ".In addition, above-below direction does not represent position relationship when being assembled into actual equipment and direction.Further, direction or almost parallel direction with centerline axis parallel are called " axis ", by the radial direction centered by central axis referred to as " radial direction ", by the circumference centered by central axis referred to as " circumference ".
Fig. 1 is the cutaway view of the internal structure of the disc drive appts 1 representing the Spindle Motor 12 (hreinafter referred to as " motor 12 ") comprised involved by preferred implementation of the present utility model.Disc drive appts 1 is so-called hard disk drive.Disc drive appts 1 such as comprises the discoideus disc 11 of recorded information, motor 12, access portion 13 and casing 14.Motor 12 keeps disc 11 and makes it rotate.13 pairs, access portion disc 11 carries out reading and the write of information.13 pairs, access portion disc 11 also can carry out the reading of information and at least one operation in writing.
As shown in Figure 1, casing 14 comprises the lower casing parts 141 of roughly cup-shaped and the plate part 142 of tabular.Casing 14 holds motor 12 and access portion 13.Specifically, disc 11, motor 12 and access portion 13 is held in the inner side of lower casing parts 141.Plate part 142 embeds lower casing parts 141 thus forms casing 14.The inner space of preferred disc drive appts 1 is the few clean room of dust.In the present embodiment, in disc drive appts 1, air is filled.In addition, also helium, hydrogen or nitrogen can be filled in disc drive appts 1.Further, the mist of these gases and air can also be filled.
Three compacted devices 151 of disc 11 and sept 152 are fixed on motor 12.In addition, three discs 11 configure equally spacedly and are fixed on the central axis J1 direction of motor 12.Access portion 13 comprises six head members, 131, six arms 132 and head member travel mechanism 133.Head member 131 is close to disc 11 thus the reading of the information of carrying out and write.Head member 131 also can carry out the reading of information and at least one operation in writing.Arm 132 supporting head parts 131.By head member travel mechanism 133, arm 132 is moved, make head member 131 and disc 11 relative movement.By these structures, head member 131, with the state close to the disc 11 rotated, accesses the desired location of disc 11.In addition, disc 11 is not limited to three, also can be more than one or two.
Fig. 2 is the schematic sectional view of the motor 12 involved by preferred implementation.
Motor 12 is motors of outer-rotor type.Motor 12 comprises rotating part 3, stationary part 2 and lubricating oil 40.Rotating part 3 rotates around central axis J1 across lubricating oil 40.
Stationary part 2 comprises axle 21, basal part 22, first cup portion 23, second cup portion 24 and stator 25.Hydrodynamic pressure bearing 4 is formed by axle 21, rotating part 3 and lubricating oil 40.Hydrodynamic pressure bearing 4 make use of the hydrodynamic from lubricating oil 40.
The central axis J1 that axle 21 vertically extends configures, and in substantial cylindrical.First cup portion 23 is positioned near the upper end of axle 21.Further, the second cup portion 24 is positioned near the bottom of axle 21.Axle 21 is such as formed by metals such as stainless steels.
The plate part 142 (with reference to Fig. 1) of disc drive appts 1 is fixed in the upper end of axle 21.Basal part 22 is fixed on across the second cup portion 24 in the bottom of axle 21.
Hole portion is formed in the central authorities of basal part 22.Basal part 22 comprises the plate portion 221 that radially expands and from the inner edge in plate portion 221 towards upwardly projecting roughly cylindric maintaining part 222.Basal part 22 also can form lower casing parts 141 at least partially.Basal part 22 both can be made up of the parts with lower casing parts 141 one.Further, basal part 22 and lower casing parts 141 also can be made up of different parts respectively.Basal part 22 is such as formed by metals such as aluminium alloys.
First cup portion 23 is roughly circular parts.First cup portion 23 comprises plectane parts 231 and endless member 232.Plectane parts 231 extend from the upper end of axle 21 to radial outside, and form with axle 21 one.Endless member 232 extends from plectane parts 231 towards downside in roughly cylindric.Endless member 232 is installed on plectane parts 231, and the lower end of endless member 232 forms the bottom of the first cup portion 23 at least partially.In addition, also can be that axle 21 is made up of different parts respectively from plectane parts 231 and plectane parts 231 are fixed on the outer peripheral face of axle 21.First cup portion 23, by plectane parts 231 and endless member 232, makes the cross sectional shape of plectane parts 231 and the intersection of endless member 232 in roughly L shape.First cup portion 23 is such as by being that the metal of main component or resin are formed with copper.
Second cup portion 24 is being fixed on the outer peripheral face of axle 21 than the first cup portion 23 position on the lower.Second cup portion 24 is pressed near the bottom of axle 21, and is fixed on axle 21 by bonding agent 7.Second cup portion 24 comprises the second flat part 241 and cylindrical portion 242.Second flat part 241 is fixed on the outer peripheral face of axle 21, and extends from axle 21 to radial outside.Further, cylindrical portion 242 is from the outer edge of the second flat part 241 towards upwardly projecting.Second cup portion 24, by the second flat part 241 and cylindrical portion 242, makes its vertical sectional shape in roughly L shape.Second cup portion 24 is such as by being that the metal of main component or resin are formed with copper.
Second cup portion 24 is fixed on basal part 22 with the state making the outer peripheral face of cylindrical portion 242 and contact with the inner peripheral surface of the maintaining part 222 of basal part 22.That is, axle 21 is fixed on basal part 22 indirectly across the second cup portion 24.In addition, axle 21 and the second cup portion 24 also can be made up of single parts.
Stator 25 is installed on basal part 22.The revolving force (torque) centered by central axis J1 is produced between stator 25 and the rotor magnet 33 being configured in around axle 21.That is, stator 25 and rotor magnet 33 are driving mechanisms that rotating part 3 is rotated relative to stationary part 2.
Rotating part 3 comprises rotor hub 32, rotor magnet 33 and cap portion 34.
Rotor hub 32 is the rotating partss rotated centered by central axis J1 around axle 21.Rotating part 3 comprises the first upper surface 32b, annular recessed portion 321a, the first inner peripheral surface 32a and the second inner peripheral surface 32e.Rotor hub 32 comprises sleeve part 321, cap 322, outside cylindrical portion 323 and flange part 324.Sleeve part 321 is the roughly cylindric parts comprising the inner peripheral surface opposed with the outer peripheral face of axle 21.Sleeve part 321 is configured between the plectane parts 231 of the first cup portion 23 and the second flat part 241 of the second cup portion 24 in the axial direction.Cap 322 is expanded from the upper end of sleeve part 321 towards radial outside.Outside cylindrical portion 323 extends from the outer edge of cap 322 towards downside.Flange part 324 is outstanding from the bottom in outside cylindrical portion 323 towards radial outside.The outer peripheral face in outside cylindrical portion 323 is the contact-making surface contacted with the inner peripheral portion of three discs 11.Further, the upper surface of flange part 324 is the mounting surface of mounting disc 11.
Rotor magnet 33 is fixed on the inner peripheral surface in the outside cylindrical portion 323 of rotor hub 32.Roughly circular in centered by central axis J1 of rotor magnet 33.
Cap portion 34 comprises cap cylindrical portion 341 and cap portion 342.Cap cylindrical portion 341 is the roughly cylindric parts centered by central axis J1.Cap portion 342 is the roughly circular parts from cap cylindrical portion 341 towards radially inner side.Cap portion 34 is mounted by being embedded in rotor hub 32.
Fig. 3 represents the schematic sectional view near the first cup portion 23 involved by preferred implementation.
At the sleeve part 321 of rotor hub 32, the first inner peripheral surface 32a, the first upper surface 32b, barrel surface 32c, the second upper surface 32d and the second inner peripheral surface 32e are set.First inner peripheral surface 32a is opposed with the outer peripheral face of axle 21.First upper surface 32b is the face expanded towards radial outside from the upper end of the first inner peripheral surface 32a.First upper surface 32b is opposed with the lower surface of the plectane parts 231 of the first cup portion 23 across the first gap 52a.Barrel surface 32c is the face extended towards downside from the outer edge of the first upper surface 32b.Barrel surface 32c is opposed with the inner peripheral surface of the endless member 232 of the first cup portion 23 across the second gap 52b.Second upper surface 32d is the face expanded from the bottom of barrel surface 32c to radial outside.Second upper surface 32d is opposed with the lower surface of the endless member 232 of the first cup portion 23 across third space 52c.Second upper surface 32d is the bottom surface of the annular recessed portion 321a of the upper surface being formed at sleeve part 321.At least bottom of the endless member 232 of the first cup portion 23 is held at this annular recessed portion 321a.
Second inner peripheral surface 32e is opposed across the 4th gap 52d with the outer peripheral face of the first cup portion 23.4th gap 52d is the seal clearance radially expanded.Seal clearance is radial clearance.More particularly, comprise as the 4th gap 52d of seal clearance the capillary seal portion 521 that radial width expands gradually towards upside.There is lubricating oil 40 in the gap between the surface of stationary part 2 and the surface of rotating part 3.The upper liquid level 401 of lubricating oil 40 is positioned at the 4th gap 52d as seal clearance.More particularly, the upper liquid level 401 of lubricating oil 40 is positioned at capillary seal portion 521.Further, lubricating oil 40 lower liquid level 402 than annular recessed portion 321a position on the lower between stationary part 2 and rotating part 3.More particularly, lower liquid level 402 is between the second cup portion 24 and rotor hub 32.
Also radial dynamic pressure generation trough (diagram is omitted) can be set at the first inner peripheral surface 32a of sleeve part 321.Radial dynamic pressure generation trough makes the lubricating oil 40 in the gap 50 (hereinafter referred to as radial clearance 50) be held between the outer peripheral face of axle 21 and sleeve part 321 produce hydrodynamic.By this structure, form Journal Bearings in Hydrodynamic Lubrication portion (diagram is omitted) in radial clearance 50.Radial dynamic pressure generation trough is the set of the multiple grooves circumferentially arranged.Radial dynamic pressure generation trough is preferably herringbone, but is not limited thereto, and also can be arc-shaped etc.
At the first upper surface 32b of sleeve part 321, upper axial dynamic pressure generation trough (diagram is omitted) is set.Axial hydrodynamic generation trough makes the lubricating oil 40 be held in the first gap 52a produce hydrodynamic when rotating part 3 rotates.Upper axial dynamic pressure generation trough is the set of the multiple grooves circumferentially arranged.By this structure, form upper axial dynamic pressure shaft bearing portion (diagram is omitted) at the first gap 52a.
Further, bottom axial hydrodynamic generation trough (diagram is omitted) is set at the lower surface of sleeve part 321.Bottom axial hydrodynamic generation trough makes the lubricating oil 40 being held in the 4th gap 52e produce hydrodynamic when rotating part 3 rotates.The 4th gap 52e is formed between the lower surface and the upper surface of cylindrical portion 242 of sleeve part 321.Bottom axial hydrodynamic generation trough is the set of the multiple grooves circumferentially arranged.By this structure, form axial hydrodynamic bearing portion, bottom (diagram is omitted) at the 4th gap 52e.
Upper axial dynamic pressure generation trough also can not be arranged at the first upper surface 32b of sleeve part 321, and is arranged at the lower surface of plectane parts 231.Further, bottom axial hydrodynamic generation trough also can not be arranged at the lower surface of sleeve part 321, and is arranged at the upper surface of cylindrical portion 242.Further, hydrodynamic pressure bearing 4 both only can have any one party in upper axial dynamic pressure generation trough and bottom axial hydrodynamic generation trough, also can both have.Further, in Journal Bearings in Hydrodynamic Lubrication portion, radial dynamic pressure generation trough also can be arranged at the outer peripheral face of axle 21.
The joint gap 55 of the inner side arriving the first cup portion 23 from the outer peripheral face of the first cup portion 23 is formed between plectane parts 231 and endless member 232.At this, what the inner side of the first cup portion 23 represented is at the position of the first cup portion 23, the first gap 52a opening between the lower surface and the first upper surface 32b of plectane parts 231.As shown in Figure 3, joint gap 55 comprises end play 551 that is parallel with central axis J1 or that extend substantially in parallel and radial clearance 552 that is vertical with central axis J1 or that generally perpendicularly extend.Being filled up by bonding agent 7 at least partially of joint gap 55.
In the present embodiment, plectane parts 231 comprise the first flat part 2311 and protuberance 2312.First flat part 2311 is in roughly circular.Protuberance 2312 is outstanding towards downside from the lower end of the first flat part 2311.The lower surface of plectane parts 231 is opposed in the axial direction with the upper surface of endless member 232 across radial clearance 552.Specifically, the lower surface of the first flat part 2311 is opposed in the axial direction with the upper surface of endless member 232 across radial clearance 552.Protuberance 2312 is opposed diametrically with the inner peripheral surface of endless member 232.Specifically, the outer peripheral face of protuberance 2312 is opposed diametrically with the inner peripheral surface of endless member 232 across end play 551.Radial clearance 552 arrives the outer peripheral face of the first cup portion 23.That is, radial clearance 552 arrives capillary seal portion 521.Further, the axial location in the capillary seal portion 521 that the axial location being positioned at the upper liquid level 401 of the lubricating oil 40 in capillary seal portion 521 arrives than radial clearance 552 on the lower.End play 551 arrives the inner side of the first cup portion 23.More particularly, end play 551 arrives at least any one party in the first gap 52a and the second gap 52b.The axial length of end play 551 is preferably long than the radical length of radial clearance 552.In addition, the radical length of radial clearance 552 also can be longer than the axial length of end play 551.
Joint gap 55 arrives the inner side of the first cup portion 23 from the outer peripheral face of the first cup portion 23.Even if the lubricating oil 40 in hydrodynamic pressure bearing 4 arrives the outer peripheral face of the first cup portion 23 by joint gap 55, because lubricating oil 40 is accommodated in capillary seal portion 521, therefore, it is possible to it is outside to prevent lubricating oil 40 from escaping to motor 12.
Fig. 4 is the schematic sectional view being exaggerated a part of Fig. 3 of motor 12.
The position at seal clearance place opening of joint gap 55 forms the first tapered gaps 55a described later.More particularly, at the first flat part bottom incline 231a that the lower outer periphery ora terminalis configuration of the first flat part 2311 extends from the lower surface of the first flat part 2311 towards radial outside and upside.At the endless member top incline 232a that periphery, the upside ora terminalis configuration of endless member 232 extends to radial outside and downside.The first tapered gaps 55a is formed by the first flat part bottom incline 231a and endless member top incline 232a.First tapered gaps 55a is along with towards radially inner side, axial width narrows.The interface of bonding agent 7 is positioned at the first tapered gaps 55a.Bonding agent 7 is remained on by surface tension in the first tapered gaps 55a.In addition, can at least one party in the first flat part bottom incline 231a and protuberance inclined plane 231b described later be both the flexure plane extended to radial outside and upside, can be also both flexure plane.Further, at least one party in the periphery ora terminalis of the periphery ora terminalis of the lower surface of the first flat part 2311 and the upper surface of endless member 232 is inclined plane.Inclined plane is positioned at the first tapered gaps 55a.
The position of side opening in the first cup portion 23 of joint gap 55 forms aftermentioned second tapered gaps 55b.More particularly, at the protuberance inclined plane 231b that the lower outer periphery ora terminalis configuration of protuberance 2312 extends to radially inner side and downside.The second tapered gaps 55b is formed by the inner peripheral surface of protuberance inclined plane 231b and endless member 232.Second tapered gaps 55b is along with towards upside, radial width narrows.The interface of bonding agent 7 is positioned at the second tapered gaps 55b.Bonding agent 7 is remained in tapered gaps 55b by surface tension.In addition, inclined plane 231b also can be the flexure plane extended to radially inner side and downside.
Interface due to bonding agent 7 is positioned at the first tapered gaps 55a and the second tapered gaps 55b, therefore, it is possible to the gap 55 that is tightly connected further.Thereby, it is possible to prevent the lubricating oil 40 of hydrodynamic pressure bearing 4 inside from spilling to motor 12 outside.
The the first cup portion upper surface 231d radially expanded is configured at the upper surface of the first flat part 2311.Further, at the first flat part top incline 231c that periphery, the upside ora terminalis configuration of the first flat part 2311 is tilted from the first cup portion upper surface 231d to radial outside and downside.First flat part top incline 231c is preferably formed to chamfering shape.At the first flat part top incline 231c and the first cup portion upper surface 231d throughout all-round configuration first oleophobic membrane 601.First oleophobic membrane 601 also can be configured in the first cup portion upper surface 231d at least partially and the first flat part top incline 231c at least partially, there is no need the entirety being necessarily configured in the first flat part top incline 231c and the first cup portion upper surface 231d.In addition, the first oleophobic membrane 601 both only can be configured in the first flat part top incline 231c, and the first oleophobic membrane 601 also only can be configured in the first cup portion upper surface 231d.In addition, the first oleophobic membrane 601 can also be configured in the lower surface 34a in the cap portion 342 opposed with the first cup portion upper surface 231d.
Joint gap 55 is positioned at than the first oleophobic membrane 601 position on the lower at the outer peripheral face of the first cup portion 23.Therefore, prevent the lubricating oil 40 arriving the outer peripheral face of the first cup portion 23 via joint gap 55 from spilling to motor 12 outside by the first oleophobic membrane 601.
Rotor hub 32 comprises fillet surface 32f.Fillet surface 32f to central axis J1 distance along with the upper end from the second inner peripheral surface 32e elongated gradually towards upside.Further, rotor hub 32 comprises the 3rd upper surface 32g expanded from the upper end of fillet surface 32f towards radial outside.3rd upper surface 32g contacts with the lower surface in cap portion 34.At fillet surface 32f and the 3rd upper surface 32g throughout all-round configuration second oleophobic membrane 602.Second oleophobic membrane 602 also can be configured in fillet surface 32f at least partially and the 3rd upper surface 32g at least partially, there is no need the entirety being necessarily configured in fillet surface 32f and the 3rd upper surface 32g.In addition, the second oleophobic membrane 602 both can only be configured in fillet surface 32f, and the second oleophobic membrane 602 also only can be configured in the 3rd upper surface 32g.
By configuring the first oleophobic membrane 601 and the second oleophobic membrane 602, even if when lubricating oil 40 escapes to capillary seal portion 521 from hydrodynamic pressure bearing 4 inside by joint gap 55, lubricating oil 40 also can be suppressed to spill to motor 12 outside.
Fig. 5 is the schematic sectional view being exaggerated a part of Fig. 4 of motor 12.
As mentioned above, between plectane parts 231 and endless member 232, there is bonding agent 7.As shown in Figure 5, there is bonding agent 7 respectively in end play 551 at least partially at least partially and in radial clearance 552.It is further preferred that end play 551 and radial clearance 552 are filled up by bonding agent 7.That is, bonding agent 7 is filled up throughout plectane parts 231 and endless member 232.More particularly, in end play 551, fill up bonding agent 7 throughout the outer peripheral face of protuberance 2312 and the inner peripheral surface of endless member 232.Further, in radial clearance 552, bonding agent 7 is filled up throughout the lower surface of plectane parts 231 and the upper surface of endless member 232.
In end play 551, fill up bonding agent 7 throughout the outer peripheral face of protuberance 2312 and the inner peripheral surface of endless member 232.Thereby, it is possible to prevent the lubricating oil 40 of hydrodynamic pressure bearing 4 inside from being spilt to motor 12 outside by joint gap 55.
Bonding agent 7 is applied at least any one party in plectane parts 231 and endless member 232.Afterwards, make endless member 232 near plectane parts 231, thus the connecting with plectane parts 231 at least partially of endless member 232.It is further preferred that fix the inner peripheral surface of endless member 232 and the outer peripheral face of protuberance 2312 by light press-in.Further, the lower surface of the first flat part 2311 connects across bonding agent 7 with the upper surface of endless member 232.Consequently, endless member 232 is fixed on plectane parts 231.
In addition, also by the additive method such as bonding, welding, press-in, riveted joint, endless member 232 can be fixed on plectane parts 231.
Fig. 6 is the schematic sectional view near the first cup portion 23a of the variation represented involved by preferred implementation.The basic structure of variation is identical with the motor 12 of preferred implementation.
In variation, joint gap 55a comprises end play 551 that is parallel with central axis J1 or that extend substantially in parallel and has the slanted gap 553 on the inclined plane extended with certain angle of inclination relative to central axis J1.Slanted gap 553 both can tilt to radial outside and upside, also can tilt to radial outside and downside.Bonding agent 7 is there is respectively at least partially at least partially and at slanted gap 553 in end play 551.It is further preferred that end play 551 and slanted gap 553 are filled up by bonding agent 7.At slanted gap 553, fill up bonding agent 7 throughout the lower surface of plectane parts and the upper surface of endless member.
The length forming the inclined plane of slanted gap 553 is preferably long than the length of end play 551.In addition, the length forming the inclined plane of slanted gap 553 also can be shorter than the length of end play 551.
In variation, comprise end play 551 that is parallel with central axis J1 or that extend substantially in parallel due to joint gap 55a and there is the slanted gap 553 on the inclined plane extended with certain angle of inclination relative to central axis J1, therefore, it is possible to obtain the effect same with preferred implementation.
Fig. 7 is the schematic sectional view near the first cup portion 23b of other variation represented involved by preferred implementation.The basic structure of other variation is identical with the motor 12 of preferred implementation.
In other variation, joint gap 55b is radial clearance 552 that is vertical with central axis J1 or that generally perpendicularly extend.Bonding agent 7 is there is at least partially in radial clearance 552.More particularly, being filled up by bonding agent 7 at least partially of radial clearance 552.
In other variation, because joint gap 55b only includes the radial clearance 552 generally perpendicularly extended relative to central axis J1, therefore, it is possible to obtain the effect same with preferred implementation.
Fig. 8 is the schematic sectional view near the first cup portion 23c of other variation represented involved by preferred implementation.The basic structure of other variation is identical with the motor 12 of preferred implementation.
In other variation, joint gap 55c is the slanted gap 553 comprising the inclined plane extended with certain angle of inclination relative to central axis J1.Slanted gap 553 both can tilt to radial outside and upside, also can tilt to radial outside and downside.Further, if slanted gap 553 connect the first gap 52a at least partially with the second gap 52b at least partially.Slanted gap 553 also only can connect the first gap 52a, only can also connect the second gap 52b.Bonding agent 7 is there is at least partially at slanted gap 553.More particularly, being filled up by bonding agent 7 at least partially of slanted gap 553.
In other variation, only included the slanted gap 553 extended with certain angle of inclination relative to central axis J1 by joint gap 55c, the effect identical with preferred implementation can be obtained.
Fig. 9 is the schematic sectional view near the first cup portion 23d of other variation represented involved by preferred implementation.The basic structure of other variation is identical with the motor 12 of preferred implementation.
In other variation, suction socket row (diagram is omitted) are set at the second inner peripheral surface 32e of the outer peripheral face of the first cup portion 23d or the rotor hub 32 of rotating part 3.When rotating part 3 rotates, the effect arranged by suction socket, lubricating oil 40 under the bottom side pressure of endless member 232.Further, the upside of suction socket row is provided with capillary seal portion 521d, and capillary seal portion 521d is positioned at the radial clearance of the outer peripheral face of the described first cup portion 23d expanded gradually towards upside and the second inner peripheral surface 32e of described rotor hub 32.Joint gap 55 also can arrive the region forming capillary seal portion 521d.Further, joint gap 55 can also arrive the region forming suction socket row.
Above, the execution mode illustrated in the utility model is illustrated, but the utility model is not limited to above-mentioned execution mode.
In hydrodynamic pressure bearing 4, also can not form Journal Bearings in Hydrodynamic Lubrication portion, and only form the axial hydrodynamic bearing portion of at least one party.
Spindle Motor both can be axle rotary-type also can be fixed shaft type.Further, Spindle Motor both can be outer-rotor type also can be inner-rotor type.
Further, Spindle Motor does not limit the use of in disc drive appts, can be used in the various equipment such as fan yet.
Further, joint gap also can have end play, radial clearance and slanted gap simultaneously.
Above-mentioned preferred implementation and variation thereof can be carried out appropriately combined in the scope not producing contradiction.
Can think according to above-mentioned preferred implementation of the present utility model, to those skilled in the art, when not exceeding scope of the present utility model and purport, distortion and change are apparent.Scope of the present utility model is only determined by these claims.
Claims (23)
1. a Spindle Motor, it comprises stationary part and rotating part,
Described stationary part comprises:
Axle, the central axis configuration that it vertically extends; And
First cup portion,
Described rotating part can rotate around described central axis around described axle,
The feature of described Spindle Motor is,
Described first cup portion comprises:
Plectane parts; And
Endless member, it is installed on described plectane parts,
The lower end of described endless member forms the bottom of described first cup portion at least partially,
Described rotating part comprises:
First upper surface, it is opposed with described plectane parts;
Annular recessed portion, it holds at least bottom of described endless member;
First inner peripheral surface, it is opposed with the outer peripheral face of described axle; And
Second inner peripheral surface, it is opposed with the outer peripheral face of described first cup portion,
There is lubricating oil in the gap between the surface of described stationary part and the surface of described rotating part,
Hydrodynamic pressure bearing is formed by described axle, described rotating part and described lubricating oil,
The outer peripheral face of described first cup portion across as the seal clearance of radial clearance and described second inner peripheral surface of described rotating part opposed,
The upper liquid level of described lubricating oil is positioned at described seal clearance,
The joint gap of the inner side arriving described first cup portion from the outer peripheral face of described first cup portion is formed, being filled up by bonding agent at least partially of described joint gap between described plectane parts and described endless member.
2. Spindle Motor according to claim 1, is characterized in that,
Described joint gap comprises:
End play, itself and described centerline axis parallel ground extend; And
At least one party in radial clearance and slanted gap,
Described radial clearance and described central axis upright ground extend,
Described slanted gap has the inclined plane extended with certain angle of inclination relative to described central axis.
3. Spindle Motor according to claim 2, is characterized in that,
Described plectane parts comprise the protuberance outstanding towards downside,
The lower surface of described plectane parts is opposed in the axial direction with the upper surface of described endless member across described radial clearance,
The outer peripheral face of described protuberance is opposed diametrically with the inner peripheral surface of described endless member across described end play.
4. Spindle Motor according to claim 2, is characterized in that,
The axial length of described end play is longer than the radical length of described radial clearance.
5. Spindle Motor according to claim 2, is characterized in that,
Described end play at least partially and described radial clearance at least partially or described slanted gap there is described bonding agent respectively at least partially.
6. Spindle Motor according to claim 5, is characterized in that,
Described end play and described radial clearance or described slanted gap are filled up by described bonding agent.
7. Spindle Motor according to claim 3, is characterized in that,
In described end play, fill up described bonding agent throughout the outer peripheral face of described protuberance and the inner peripheral surface of described endless member.
8. Spindle Motor according to claim 6, is characterized in that,
In described radial clearance, fill up described bonding agent throughout the lower surface of described plectane parts and the upper surface of described endless member.
9. Spindle Motor according to claim 6, is characterized in that,
At described slanted gap, fill up described bonding agent throughout the lower surface of described plectane parts and the upper surface of described endless member.
10. Spindle Motor according to claim 1, is characterized in that,
Described joint gap is and the radial clearance that extends of described central axis upright ground.
11. Spindle Motors according to claim 10, is characterized in that,
Described bonding agent is there is at least partially in described radial clearance.
12. Spindle Motors according to claim 11, is characterized in that,
Being filled up by described bonding agent at least partially of described radial clearance.
13. Spindle Motors according to claim 1, is characterized in that,
Described joint gap is the slanted gap comprising the inclined plane extended with certain angle of inclination relative to described central axis.
14. Spindle Motors according to claim 13, is characterized in that,
Described bonding agent is there is at least partially at described slanted gap.
15. Spindle Motors according to claim 14, is characterized in that,
Being filled up by described bonding agent at least partially of described slanted gap.
16. Spindle Motors according to any one in claim 1 to 15, is characterized in that,
Described joint gap form the first tapered gaps at the position of described seal clearance place opening,
Described first tapered gaps along with towards radially inner side, axial width narrows,
The interface of described bonding agent is positioned at described first tapered gaps.
17. Spindle Motors according to claim 16, is characterized in that,
Described plectane parts comprise the first flat part,
At least one party in the periphery ora terminalis of the periphery ora terminalis of the lower surface of described first flat part and the upper surface of described endless member is inclined plane, and this inclined plane is positioned at described first tapered gaps.
18. Spindle Motors according to any one in claim 1 to 15, is characterized in that,
The position of side opening in described first cup portion of described joint gap forms the second tapered gaps,
Described second tapered gaps along with towards upside, radial width narrows,
The interface of described bonding agent is positioned at described second tapered gaps.
19. Spindle Motors according to any one in claim 1 to 15, is characterized in that,
Described plectane parts and described axle one are formed.
20. Spindle Motors according to any one in claim 1 to 15, is characterized in that,
At the outer peripheral face of described first cup portion or described second inner peripheral surface of described rotating part, suction socket row are set.
21. Spindle Motors according to claim 20, is characterized in that,
The upside that described suction socket arranges is provided with capillary seal portion, and this capillary seal portion is positioned at the outer peripheral face of that expand gradually towards upside, described first cup portion and the radial clearance of described second inner peripheral surface.
22. Spindle Motors according to any one in claim 1 to 15, is characterized in that,
Described seal clearance comprises the capillary seal portion that radial width expands gradually towards upside,
The upper liquid level of described lubricating oil is positioned at described capillary seal portion.
23. 1 kinds of disc drive appts, it has disc,
The feature of described disc drive appts is, comprising:
Spindle Motor described in any one in claim 1 to 22, it makes described disc rotate;
Access portion, it carries out the reading of information and at least one operation in writing to described disc; And
Casing, it holds described Spindle Motor and described access portion.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361868190P | 2013-08-21 | 2013-08-21 | |
| US61/868,190 | 2013-08-21 | ||
| US14/330,207 US9001460B2 (en) | 2013-08-21 | 2014-07-14 | Spindle motor, and disk drive apparatus |
| US14/330,207 | 2014-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204205791U true CN204205791U (en) | 2015-03-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420438107.XU Expired - Fee Related CN204205791U (en) | 2013-08-21 | 2014-08-05 | Spindle Motor and disc drive appts |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US9001460B2 (en) |
| CN (1) | CN204205791U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150081902A (en) * | 2014-01-07 | 2015-07-15 | 삼성전기주식회사 | Driving device of recording disk having the same |
| JPWO2018025986A1 (en) * | 2016-08-05 | 2019-06-06 | 日本電産株式会社 | motor |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9001460B2 (en) | 2015-04-07 |
| US20150055247A1 (en) | 2015-02-26 |
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